https://www.thevespiary.org/rhodium/Rhodium/chemistry/benzylchloride.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/benzylchloride.html)
http://www.kemi.se/kemamne_eng/dibenzoylp_eng.htm (http://www.kemi.se/kemamne_eng/dibenzoylp_eng.htm)
It is normally sold mixed with water
The lab grade form, yes, contains about 20% water as a desensitizer. But not the OTC variant from the hobby shop, it's perfectly dry, prilled stuff...must be something different in it!